type NanoSecond = u64;
type Inch = u64;

#[allow(non_camel_case_types)]
type u64_t = u64;

fn main() {
    println!("Hello, world!");

    let nanoseconds: NanoSecond = 5 as u64_t;
    let inches: Inch = 2 as u64_t;
    println!("{} nanoseconds + {} inches = {} unit?", nanoseconds, inches, nanoseconds + inches);
}
